Andymonium

from wikipedia: Henmania is the state of hysteria at the possibility of Tim Henman winning the men's singles at the Wimbledon Championships in tennis.

It is commonly found on Henman Hill a large grassy bank in the All England Lawn Tennis Club with a large television screen so that the fans that have not managed to gain a ticket for the actual court side can watch the big matches.

A cure for Henmania could be:

Henman managing to win the event. More high-standard British tennis players being in existance, thus de-saturating the mass support of Henman, creating an alternative to Tiger Tim.A recently observed derivation is Andymonium, after Andrew Murray. This may not be a cure as such, but may well be a desirable alternative.